Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

C# Intermediate C# Abstraction Interfaces

Posted by Glenn Heimburger
Glenn Heimburger
4,828 Points

Help with Challenge #2. Message "Does Increment have a constructor that takes no parameters?"

I'm getting the above message when I Check my code. { abstract class Increment : IUnaryOperation { public Increment() {}

    public virtual double Perform(double value)
    {
        return value += 1;
    }
}

}

2 Answers

Steven Parker
Steven Parker
229,732 Points
Steven Parker
Steven Parker
229,732 Points

The instructions didn't ask for the new class to be abstract.

Also, you don't need an explicit constructor if you don't do anything different from what the system assumes by default (no arguments, no code body).

Krystin White
Krystin White
1,887 Points
Krystin White
Krystin White
1,887 Points

Also, the abstract and virtual modifiers are not needed.